Abstract 20191: Do Wearable Activity Trackers Improve Subjective Health Status, Physical Activity And Cardiometabolic Risk?
Introduction: We assessed the impact of a commercially available wearable activity tracker on health status, physical activity (PA) and cardiometabolic risk.
Methods: Healthy volunteers used a wearable device for minute-by-minute recording and display of PA including steps / day and caloric expenditure. Activity goals were not prescribed. Health status (SF-12, GAD 7, PHQ-9, & the Satisfaction With Life Scale) and cardiometabolic risk [BMI, waist hip ratio, SBP, DBP, HBA1c and lipids] was assessed. Participants were asked whether PA increased during the study. Change in cardiometabolic risk factors was assessed via linear mixed models.
Results: Of 431 volunteers, 322 had sufficient PA data. Average study duration was 5.2 ± 0.6 months. Measures of health status were unchanged, with the exception of the SF-12 vitality subscale (52 ± 8 at baseline vs 54 ± 8 at study end, p = 0.006). Over half (57%) reported a subjective increase in PA. However, wearable device data did not confirm objective increases in PA, whether measured as average change in total daily step or calorie count. Further, PA was not higher among participants who reported increased PA (Fig 1). On average, SBP increased 1.6 mmHg over the study period (SE=0.62, p=0.01) whereas waist hip ratio decreased by 0.03 (SE=0.001, p < 0.0001). Other cardiometabolic factors were unchanged.
Conclusion: The use of a wearable device influenced vitality but did not increase PA. Dissociation between self-reported and objective PA was observed. Future studies evaluating use of a wearable device beyond five months will be important for understanding their long-term impact.
Figure 1 Scatterplot of individual daily step counts (grey) with smoothed regression curves comparing expected steps of those with self-reported increase in PA (red) versus those who did not (green).
Author Disclosures: L.J. Burchill: Research Grant; Modest; Intel Corporation. M. Niederhausen: None. Y. Wang: None. S. Colner: Employment; Significant; Intel Corporation. D. Bogia: Employment; Significant; Intel Corporation. N. Fino: None. D. Yanez: None. J. Minner: None. P. Shah: Employment; Significant; Intel Corporation. S. Thosar: None. S. Shea: None. J. Cigarroa: None. A. Nayak: Employment; Significant; Intel Corporation. J. Lapidus: Research Grant; Modest; Intel Corporation.
- © 2016 by American Heart Association, Inc.